Hygrometer
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A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity. Modern electronic devices use temperature of condensation, or changes in electrical capacitance or resistance to measure humidity changes.
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- Related: Dewcell, Moisture analysis
IMA moisture measurement training site IMA moisture measurement training site www.ima.co.uk/theory.html - Web |
USATODAY.com: How a Sling Psychrometer Works USATODAY.com: How a Sling Psychrometer Works www.usatoday.com/weather/wsling.htm - Web |
NIST page on humidity calibration NIST page on humidity calibration ts.nist.gov/MeasurementServices/Calibrations/Humidity.cfm - Web |
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Article on difficulty of humidity calibration Article on difficulty of humidity calibration www.veriteq.com/humidity/calibration.htm - Web |
Article on RH sensors Article on RH sensors www.padfield.org/tim/cfys/datalog/datlog4.php - Web |
NOAA homepage for cryogenic chilled-mirror frostpo... NOAA homepage for cryogenic chilled-mirror frostpoint hygrometers www.esrl.noaa.gov/gmd/ozwv/wvap/ - Web |